Solved Cooldown with currentTimeMillis()

Basically, i've expended all my time today trying to make that works. When i try to make a cooldown with System.currentTimeMillis() it not work!

MY CODE

Code:

public void onEnable(){

        long left = ((System.currentTimeMillis()/1000) + 60) - (System.currentTimeMillis()/1000);


        if(left > 1){
            Bukkit.getConsoleSender().sendMessage("\n\n§aTime: §b"+left);
            return;
        }

        if(left < 1){
            Bukkit.getConsoleSender().sendMessage("\n\n§aTime: §bComplete!");
        }

}

i maked a post in stack overflow, spigot forums and no one can help me... Please, can someone help me here?

ah, he send just one message to my console, but i want to get messages saying woh much time will take to end this cooldown